Stock Plans (Details 1) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2023 |
Sep. 30, 2022 |
Sep. 30, 2023 |
Sep. 30, 2022 |
|
| Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] | ||||
| Total stock-based compensation | $ 411 | $ 523 | $ 965 | $ 967 |
| Research and Development Expense [Member] | ||||
| Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] | ||||
| Total stock-based compensation | 52 | 306 | 106 | 553 |
| General and Administrative Expense [Member] | ||||
| Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] | ||||
| Total stock-based compensation | $ 359 | $ 217 | $ 859 | $ 414 |